Igor_U Posted November 18, 2019 Report Share Posted November 18, 2019 Fuel pump failure I have had at the end of the flight made me forget about oil pressure issue at the start up. After engine start, I had Zero oil pressure! BTW, EI CGR30P engine monitor and my IO360 A1A always indicates high (my IA suggests to leave it as is.) and that can be annoying as it’s just over 100 psi at the startup and engine monitor flashes red. I shut down after maybe 30 sec or so. Oil pressure sensor is on Firewall (engine side) as per EI install instructions. I’ve disconnected the oil hose and had to turn one or two prop turns for oil overflowing and re-connected the hose. Upon the engine start OP was instantly normal, around 100 psi as always when cold… No indication issues during 2+ hour flight. I don’t think this is a developing issue with oil pressure sensor but what can it be? Air in the system (hose going to the sensor)? This happened once before (a year ago) and was fixed the same way as this time. What do you gays say? Makes me go back to old gauge and “ignorance is bliss” method. Thank you. Quote Link to comment Share on other sites More sharing options...
carusoam Posted November 19, 2019 Report Share Posted November 19, 2019 Sounds like it may be a sensor issue... either powering it or grounding it... or connecting it to the instrument... PP thoughts only, not a sensor guy... Best regards, -a- Quote Link to comment Share on other sites More sharing options...
DonMuncy Posted November 19, 2019 Report Share Posted November 19, 2019 11 hours ago, carusoam said: Sounds like it may be a sensor issue... either powering it or grounding it... or connecting it to the instrument... PP thoughts only, not a sensor guy... Best regards, -a- I would bet a bunch on this opinion. It would seem almost inconceivable that the mechanical aspects of oil pressure would be bad and then cure themselves. 1 Quote Link to comment Share on other sites More sharing options...
1964-M20E Posted November 20, 2019 Report Share Posted November 20, 2019 I have the EI gauges as well and the PT-100GA sensors have given me cause for concern in the past. I installed new oil and fuel sensors over the last couple of years and pressure problems went away. Quote Link to comment Share on other sites More sharing options...
Igor_U Posted November 20, 2019 Author Report Share Posted November 20, 2019 I spoke to EI support and they recommended testing the transducer. 100ps air pressure on the unit should result in 50mV between green and white signal wire. I'll have to check the connections again next time in hangar; it is possible I wiggled the wires when disconnecting the oil hose but it all looked very solid to me. I understand transducer can fail but this is only at the engine start - inflight pressure is solid. Quote Link to comment Share on other sites More sharing options...
romeotango Posted November 21, 2019 Report Share Posted November 21, 2019 Check out this Mike Busch article on the subject: https://www.savvyaviation.com/wp-content/uploads/articles_aopa/AOPA_2019-12_hostage-situation.pdf 1 Quote Link to comment Share on other sites More sharing options...
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